An article in the New York Times by Benedict Carey reports on recent studies of non-verbal communication. Namely, touch. According to the article, scientist have discovered a correlation between physical contact and human performance in terms of sports and relationships. Essentially, the more touch, the better the player does and the closer the relationship. Although this correlation was determined, the causation was not.
Scientist Michael Kraus has plans for testing causation in a lab environment to determine which comes first, the touch or the positive performance. I thought that this was a natural second step and I'm curious to know how they intend to set up an experiment. I'm assuming that some sort of Solomon 4-group design will be used and I'm interested to hear about the results.